Flow regulator



FIG. 1 is a top, front perspective view of a flow regulator according to my design;

FIG. 2 is a bottom, rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings form no part of the claimed design. 

The ornamental design for a flow regulator, as shown and described. 